Still, Exxon under Rex Tillerson outspent others in the oil and gas industry in 2016, including Koch Industries and Royal Dutch Shell. The industry as a whole spent $88.6 million in 2016.

Exxon-Mobil also leaned heavily on the revolving door that Trump has sought to target: Of its 29 registered lobbyists, 22 were labeled as “revolvers,” one time government employees who now lobby. (That’s a 76 percent revolving rate.) Those lobbyists included former Sen. Don Nickles, R-Okla., a principal of the lobbying firm Nickles Group, which has also lobbied for energy companies Anadarko Petroleum and Exelon.

Exxon representatives also lobbied the Department of State, which Rex Tillerson would oversee if he is confirmed. Exxon’s chief issue in Congress was a major energy bill that cleared the Senate, but failed to pass the House.

House Speaker Paul Ryan explained 'draining the swamp' during a press briefing Thursday, and said congressional Republicans are ready to move forward with President-elect Donald Trump’s agenda.

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Rex Tillerson, Chairman, President and CEO of Exxon Mobil Corporation speaks during an Economic Club of Washington event on March 12, 2015 in downtown Washington, D.C. Donald Trump announced Tuesday he is nominating Tillerson to be secretary of state. Kris TripplaarTNS